Stats overlay lingers when keeping key down

mpv version and platform

mpv 0.29.1 Copyright © 2000-2018 mpv/MPlayer/mplayer2 projects
 built on Sun Dec  9 16:21:27 CET 2018
ffmpeg library versions:
   libavutil       56.22.100
   libavcodec      58.35.100
   libavformat     58.20.100
   libswscale      5.3.100
   libavfilter     7.40.101
   libswresample   3.3.100
ffmpeg version: n4.1

Reproduction steps

Play a file and keep i pressed down for some time. Release the key.

Expected behavior

After releasing i, the stats overlay stays visible for the duration script-option of stats.lua.

Actual behavior

The stats overlay stays visible for duration plus some time depending on how long the key was kept down.
This is probably happening because key repetition events happen faster than the redraw of the stats, so events get backed up. Drawing in an idle handler could solve this.

Log file

https://0x0.st/snlY.json

Start by reading stats.lua and tracing how repeated i-key events reach the stats overlay. Reproduce the issue by holding i, then release it and compare the overlay lifetime with the configured duration; done means key repetition no longer extends that lifetime.